The Seiko 1E20-5980 is a watch model based on the 1E20 movement.
Parts List
| K03N30JM | crystal |
| K03N30JM01 | crystal - crystal (inorganic) |
| 30M98NA1 | crown |
| 0H1200N01 | case back gasket |
| 0H1200N0 | case back gasket |
| DZ0041B0 | case back gasket |
| Q5023C | band - other band |
| Q5023C-LKG | band - link |
| Q5023C-BK4G | clasp - clasp |
| Q5023C-EPG | others - endpiece |
| 0351931 | others - winding stem |
| 81182699 | others - bracelet fixing pipe |
| 81609399 | others - bracelet fixing pin |
| 82802480 | others - case ring |
| 1E201730XG14 | others - dial |
| 1E205980 | others - case back |
| 1E2059802E | others - case |
| 1E208 | others - machine code |
| 03V08DGH | others - hour hand |
| 03V08DGM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
Caliber 1E20
